<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.6.10/dist/vue.js"></script>
    <style>
      .one {
        width: 100px;
        height: 100px;
        background-color: yellow;
      }
      .two {
        width: 200px;
        height: 200px;
        background-color: hotpink;
      }
      .three {
        width: 250px;
        height: 250px;
        background-color: red;
      }
      .active{
        color: aquamarine;
      }
    </style>
  </head>

  <body>
    <div id="app">
      <div :class="className[1]">苏菲</div>
    </div>
    <script>
      Vue.config.productionTip = false;
      //实例化Vue
      const vm = new Vue({
        el: "#app",
        data() {
          return {
            className:[
              'one','two','three'
            ],
            isActive:true
          };

        },
      });
    </script>
  </body>
</html>
